The addon armor duplication bug

Hello Minecraft administrators.
I am reporting an issue with my custom equipment addon that I created in Minecraft.
The problem is that in order for the addon to work,
I need to enable the Experimental Gameplay button in the map settings.
However, when I turn on the Experimental Gameplay mode,
certain armor pieces are automatically equipped even though
I haven't equipped them manually.
This issue affects not only server administrators but also server members and visitors.
I would greatly appreciate it if you could fix this problem.

「 Minecraft Version: 1.20.10? 1.20.10.01? 」

The video file size is too large, so I will send you a YouTube link instead.
Link : https://youtu.be/TJnPirp61Lo